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Otago HSFY chat - archive
- Thread starter jeavey
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Sam
¿umm?
https://www.physics.otago.ac.nz/teaching/PHSI191/PHSI191_exams/ - Go there, select the paper/module then set the "answer style" to instant feedback, it will give worked examples of most of the questions. Very helpful to get a sense of what they will be looking for.
It looks pretty easy IMO, very simple mechanics problems anyways, just really basic things without any angles (yay no trig!).
Heh, so thankful to have advice from med students, gives you that little bit of an upper-hand over those who haven't got that advice (Damn HSFY for making me so competitive! >_<).
They should've been released on the PHSI191 Blackboard.
Voldemort
Brodemort
[MENTION=14039]purpleoctopus[/MENTION] I think this might come in handy for you: If you take your laptop with you and have a stable internet connection you can actually watch your lectures live online (if they are being streamed). Just go to Video Streaming, Information Technology Services, University of Otago, New Zealand, click on the lecture theatre in which the lecture is being delivered, and during the lecture you should be able to hear the lecturer and see the slides. You will need to have Microsoft Silverlight installed and not be on the uni network (for some reason it doesn't seem to work at uni). For everyone else who can go to lectures, I suggest you stop whinging and just go to your lectures.
As for the GLM, I strongly recommend doing your booklet for CELS, because you only have one shot at the test, so you should do it once and do it right.
For HUBS, I strongly recommend NOT doing your booklets. Its a waste of time (though perhaps you should flick through them and see whether there is any stuff in the booklet not in the lectures particularly if the lecturers refer to certain sections on the booklet).
As for the GLM, I strongly recommend doing your booklet for CELS, because you only have one shot at the test, so you should do it once and do it right.
For HUBS, I strongly recommend NOT doing your booklets. Its a waste of time (though perhaps you should flick through them and see whether there is any stuff in the booklet not in the lectures particularly if the lecturers refer to certain sections on the booklet).
How is everyone else doing?Nimbus2000
Regular Member
I applaud your committement lulwut! I find myself seriously lagging behind :S...
A question for the veteran hsfy-ers :
The hubs mid sem test is a multiple choice test like the other ones right?
and even if it isn't ... Are the questions all scenario based? Is there anything that'll make you pretty much recall info from the spot? E.g. 'Name the 4main features of homeostatic control mechanisms as described by Walter something cannon?'
[OFFTOPIC][MENTION=14020]lulwut[/MENTION] sorry I havent gotten around to adding you the fb group yet! I will do it ASAP... But just so you know..dw the second studyngroup ( we had to break it into smaller groups coz there were too many people) hasn't had a study session yet... So it's all good! [/OFFTOPIC]
A question for the veteran hsfy-ers :
The hubs mid sem test is a multiple choice test like the other ones right?
and even if it isn't ... Are the questions all scenario based? Is there anything that'll make you pretty much recall info from the spot? E.g. 'Name the 4main features of homeostatic control mechanisms as described by Walter something cannon?'
[OFFTOPIC][MENTION=14020]lulwut[/MENTION] sorry I havent gotten around to adding you the fb group yet! I will do it ASAP... But just so you know..dw the second studyngroup ( we had to break it into smaller groups coz there were too many people) hasn't had a study session yet... So it's all good! [/OFFTOPIC]
25 MCQs, lectures 1-16(?).
But yes, all MCQ.
It is MCQ.
Stuff in fluid. In HUBS you're obviously looking at body fluids, so the 'stuff' is going to be salt, glucose, proteins, and so on, anything which changes the osmolarity of the fluid. Basically, if it's in a body fluid, and it isn't water, it's going to be osmotically active (I'm not entirely sure if this holds for the respiratory gasses, but I doubt you need to worry about respiratory gasses just yet).
Profiterole
Regular Member
Seconded!
Nimbus2000
Regular Member
Helllloww everybody! I'm trying to find a definition of "tonicity" I get wat it means etc... But when it comes to the definition... I seem to be going in circles. I looked at what the lecturer gave as the definition, the textbooks definition (well... Technically not a definition but there is definitely an implied definition) and also a definition on the net...all three are completely different to each other... Actually they're not different just that one talks about cell volume, the other talks about the effect of ECF volume on cells and the other says its osmolarity measured in words... Do I just stick with what the lecturer gave us? Anyone else coming across this problem, or am I just blind?
Sam
¿umm?
Yeah, I found this as well. Every website has a completely different definition. I would just go with what the lecturer gave us, he probably writes the exam questions anyways.
I think it's important that you guys understand the concept of tonicity, along with the implications. Here's my understanding based on the teachings of HUBS191:
Osmolarity is a measure of the amount of moles of osmotically active particles per litre of solvent. This literally means "number of particles" - NaCl counts as two particles: Na+ and Cl-
Tonicity is an indication of the effect a solution has on a cell's volume. It's only affected by the amount of substances that don't cross the membrane.
Example: let's say we have a solution of NaCl that is at 280 mosmol/L, it would be iso-osmotic as the solution is of the same osmolarity as intracellular fluid, and because NaCl doesn't cross the membrane (in an uncontrolled manner), it would also be isotonic.
On the other hand if we had a solution of urea at 280 mosmol/L, it would be iso-osmotic again, but because urea is able to cross the membrane, and is not present inside the cell at such high concentration, the cell is dipped entirely into substances that can go into the membrane, and the extracellular concentration of those substances is higher, so both water and urea will tend to go into the cell, causing the cell to take on volume, meaning the solution is hypotonic.
Short story: iso-osmotic means same concentration, isotonic means won't cause the cell to take on volume, and whatever you do, remember that iso-osmotic doesn't always mean isotonic!
Osmolarity is a measure of the amount of moles of osmotically active particles per litre of solvent. This literally means "number of particles" - NaCl counts as two particles: Na+ and Cl-
Tonicity is an indication of the effect a solution has on a cell's volume. It's only affected by the amount of substances that don't cross the membrane.
Example: let's say we have a solution of NaCl that is at 280 mosmol/L, it would be iso-osmotic as the solution is of the same osmolarity as intracellular fluid, and because NaCl doesn't cross the membrane (in an uncontrolled manner), it would also be isotonic.
On the other hand if we had a solution of urea at 280 mosmol/L, it would be iso-osmotic again, but because urea is able to cross the membrane, and is not present inside the cell at such high concentration, the cell is dipped entirely into substances that can go into the membrane, and the extracellular concentration of those substances is higher, so both water and urea will tend to go into the cell, causing the cell to take on volume, meaning the solution is hypotonic.
Short story: iso-osmotic means same concentration, isotonic means won't cause the cell to take on volume, and whatever you do, remember that iso-osmotic doesn't always mean isotonic!
Profiterole
Regular Member
for the cels glm book, for activity 1, where can we find the number of surrounding membranes (and special structures- what defines something as special?)
Sam
¿umm?
I just wiki'd them. Most of the time they have a section titled "structure" which tells you how many membranes there are.
Profiterole
Regular Member
are we allowed to discuss answers to the booklet here?
You realise if you discuss it here, then anyone can read it (and a LOT more people lurk MSO than you'd think)? And, well, HSFY is a competition... But if you want to, then I doubt there's much stopping you (although the booklets say something about being copyrighted and whatnot, so I'd advise against writing out entire questions or suchlike).
If I were you, I'd discuss it with friends/on that facebook group you guys have.
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